CN107238886A - A kind of glass light guide plate and preparation method thereof - Google Patents
A kind of glass light guide plate and preparation method thereof Download PDFInfo
- Publication number
- CN107238886A CN107238886A CN201710549436.XA CN201710549436A CN107238886A CN 107238886 A CN107238886 A CN 107238886A CN 201710549436 A CN201710549436 A CN 201710549436A CN 107238886 A CN107238886 A CN 107238886A
- Authority
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- China
- Prior art keywords
- glass
- light guide
- guide plate
- coated
- optics site
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The present invention relates to a kind of glass light guide plate and preparation method thereof.It includes glass and lower glass, and the upper surface of the lower surface of the upper glass and lower glass fits, and the lower surface of upper glass is coated with uniform quantum dot by way of vacuum evaporation；The upper surface of the upper glass is coated with the diffusion layer for light to be spread to atomization, and the lower surface of the lower glass is provided with the optics site layer for being used for that line source to be converted into area source.The glass light guide plate is widely used in the sidelight type backlight module of blue LED lamp, substitutes traditional PMMA or MS material light guide plates, instead of quantum film, cancels aluminium backboard, makes TV modules to ultrathin, the development of superelevation Qinghua；The property of light guide plate is remained simultaneously, and on the premise of the macroscopical color saturation of optimization, optics net-pont design can be carried out again, optimizes the uniformity of picture, it is significant in ultrathin and the TV modules of superelevation colour gamut.
Description
Technical field
The present invention relates to a kind of glass light guide plate and preparation method thereof.
Background technology
Traditional liquid crystal TV uses acrylic light guide plate, and thickness is generally 2-4mm, along with aluminium backboard etc., overall
Thickness can exceed 1cm, and this causes designer to be difficult to reduce television set thickness again；But newest structure is to use glass light guide plate,
Glass light guide plate and reflector plate are bonded together with ultra-violet curing pressure sensitive adhesive, light guide plate assembly, the light of this component is just constituted
Performance and mechanical performance are learned, is integrally better than traditional acrylic light guide plate assembly；, can due to the high-mechanical property of glass in itself
To cancel the use of aluminium backboard, LCD TV is become thinner, most it is thin can be less than 5mm, reduce television set 70% thickness and
30% weight.On available liquid crystal display, as in bright gay color degree requires more and more higher, the frame of quantum film can be typically used
Structure mode come improve chromaticity and improve efficiency.Current quantum film is two PET up and down, the quantum dot that centre is uniformly coated
Pressing is formed, and available liquid crystal display packaging technology is complicated, and price is high, cuts utilization rate low.
The content of the invention
Present invention seek to address that there is provided a kind of glass light guide plate and preparation method thereof, the glass light guide plate for above mentioned problem
It is widely used in the sidelight type backlight module of blue LED lamp, traditional PMMA or MS material light guide plates is substituted, instead of quantum
Film, cancels aluminium backboard, makes TV modules to ultrathin, the development of superelevation Qinghua；The property of light guide plate is remained simultaneously, in optimization macroscopic view
On the premise of color saturation, optics net-pont design can be carried out again, optimize the uniformity of picture, in ultrathin and superelevation colour gamut
TV modules in it is significant；The technical scheme that it is used is as follows：
A kind of upper surface of glass light guide plate, including upper glass and lower glass, the lower surface of the upper glass and lower glass
Fit, and the lower surface of upper glass is coated with uniform quantum dot by way of vacuum evaporation；The upper table of the upper glass
Face is coated with the diffusion layer for light to be spread to atomization, and the lower surface of the lower glass, which is provided with, to be used to line source being converted into face
The optics site layer of light source.The lower thickness of glass is 0.5mm-2mm, and the upper thickness of glass is 0.3mm-1mm.
On the basis of above-mentioned technical proposal, glass glue bond is passed through between the upper glass and lower glass.
On the basis of above-mentioned technical proposal, the diffusion layer is made of diffusant, and the main component of diffusant is third
Olefin(e) acid resin, it is coated uniformly on the upper surface of upper glass by the way of roller coat.
On the basis of above-mentioned technical proposal, the arrangement of the optics site in the optics site layer is curved and close
The local optics site arranging density of light source is small, and the local optics site arranging density away from light source is big.
On the basis of above-mentioned technical proposal, ink is printed with the optics site layer.
On the basis of above-mentioned technical proposal, the temperature of the vacuum evaporation is less than or equal to 60 degrees Celsius.
On the basis of above-mentioned technical proposal, red, green and the blue volume ratio of the quantum dot are 1:2:3, amount
Son point is reconciled with epoxide resin reactive diluent；Vacuum 1*10-1-1*10-6Pa, temperature range is 45-55 DEG C.
A kind of preparation method of glass light guide plate, it includes
Quantum dot is coated in the lower surface of upper glass；
It is by glass cement that the upper surface of the lower surface of upper glass and lower glass is bonding in vacuum chamber, and glass cement
Width is 3-4mm, and is inwardly started at from the edge of upper glass and lower glass；The main component of glass cement is sodium metasilicate and organosilicon
Ketone；
The diffusant for light to be spread to atomization is coated by roll coating model in the upper surface of upper glass；
In the lower surface design optics site layer and printing-ink of lower glass；
Glass light guide plate is positioned in backlight module, and the lower surface of lower glass and the reflector plate phase in backlight module
It is right.On the basis of above-mentioned preparation method, quantum dot is coated on the lower surface of upper glass, and vacuum by way of vacuum evaporation
The temperature of evaporation is less than or equal to 60 degrees Celsius.On the basis of above-mentioned preparation method, the optical network in the optics site layer
The arrangement of point is curved and small close to the local optics site arranging density of light source, and the local optics site away from light source is arranged
Density is big.
Beneficial effects of the present invention are：The glass light guide plate is widely used in the sidelight type backlight module of blue LED lamp,
Traditional PMMA or MS material light guide plates are substituted, instead of quantum film, cancels aluminium backboard, makes TV modules to ultrathin, superelevation Qinghua
Development；The property of light guide plate is remained simultaneously, on the premise of the macroscopical color saturation of optimization, optics site can be carried out again and is set
Meter, optimizes the uniformity of picture, significant in ultrathin and the TV modules of superelevation colour gamut.
Brief description of the drawings
Fig. 1：The structural representation of the present invention；
Fig. 2：The preparation method flow chart of the present invention；
Fig. 3：The present invention is arranged at the structural representation in backlight module.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
Explanation is needed exist for, upper and lower following nouns of locality are defined on the basis of the view shown in Fig. 1, should
Understand, the use of the noun of locality should not limit the protection domain that the application is asked.
Embodiment 1：As shown in figures 1 and 3, a kind of glass light guide plate of the present embodiment, including upper glass 1 and lower glass 2,
The upper surface of the lower surface of the upper glass 1 and lower glass 2 fits, and the lower surface side that passes through vacuum evaporation of upper glass 1
Formula is coated with uniform quantum dot 100；The upper surface of the upper glass 1 is coated with the diffusion layer 3 for light to be spread to atomization,
The lower surface of the lower glass 2 is provided with the optics site layer 4 for being used for that line source to be converted into area source.The thickness of lower glass 2
For 0.5mm-2mm, the upper thickness of glass 1 is 0.3mm-1mm, and it primarily serves the effect of protection quantum dot 100.
It is preferred that, bonded between the upper glass 1 and lower glass 2 by glass cement 200, the width of glass cement 200 is 3-
4mm, and inwardly started at from the edge of upper glass 1 and lower glass 2；The main component of glass cement 200 is sodium metasilicate and organic silicone.
It is preferred that, the diffusion layer 3 is made of diffusant, and the main component of diffusant is acrylic resin, and it is used
The mode of roller coat is coated uniformly on the upper surface of glass 1.
It is preferred that, the arrangement of the optics site in optics site layer 4 is curved, and close to the local light of light source 400
Site arranging density is small, and the local optics site arranging density away from light source 400 is big.
It is preferred that, it is printed with ink on the optics site layer 4.
Further, the temperature of the vacuum evaporation is less than or equal to 60 degrees Celsius.
Further, the volume ratio of the red of the quantum dot 100, green and blueness is 1:2:3, quantum dot 100 is with ring
Oxygen resin reactive diluents are reconciled；Vacuum 1*10-1-1*10-6Pa, temperature range is 45-55 DEG C.
Embodiment 2：As shown in Figures 2 and 3, the preparation method of a kind of glass light guide plate of the present embodiment, it includes
Quantum dot 100 is coated in the lower surface of upper glass 1 by way of vacuum evaporation；And the temperature of vacuum evaporation is low
In or equal to 60 degrees Celsius；
It is by glass cement 200 that the upper surface of the lower surface of upper glass 1 and lower glass 2 is bonding in vacuum chamber, and glass
The width of glass glue 200 is 3-4mm, and is inwardly started at from the edge of upper glass 1 and lower glass 2；The main component of glass cement 200 is
Sodium metasilicate and organic silicone；
The diffusant for light to be spread to atomization is coated by roll coating model in the upper surface of upper glass 1；
In the lower surface design optics site layer 4 and printing-ink of lower glass 2；Optical network in the optics site layer 4
The arrangement of point is curved and small close to the local optics site arranging density of light source 400, the local optical network away from light source 400
Point arranging density is big；
Glass light guide plate is positioned in backlight module 300, and the reflector plate in the lower surface and backlight module of lower glass 2
5 fit.
The present invention is described by way of example above, but the invention is not restricted to above-mentioned specific embodiment, it is all to be based on
Any change or modification that the present invention is done belong to the scope of protection of present invention.
Claims (10)
1. a kind of glass light guide plate, it is characterised in that including upper glass (1) and lower glass (2), the following table of the upper glass (1)
Face and the upper surface of lower glass (2) are fitted, and the lower surface of upper glass (1) is coated with uniformly by way of vacuum evaporation
Quantum dot (100)；The upper surface of the upper glass (1) is coated with the diffusion layer (3) for light to be spread to atomization, the lower glass
The lower surface of glass (2) is provided with the optics site layer (4) for being used for that line source to be converted into area source.
2. a kind of glass light guide plate according to claim 1, it is characterised in that：The upper glass (1) and lower glass (2) it
Between pass through glass cement (200) bond.
3. a kind of glass light guide plate according to claim 1, it is characterised in that：The diffusion layer (3) uses diffusant system
Into the main component of diffusant is acrylic resin, and it is coated uniformly on the upper surface of upper glass (1) by the way of roller coat.
4. a kind of glass light guide plate according to claim 1, it is characterised in that：Optics in the optics site layer (4)
The arrangement of site is curved, and small close to the local optics site arranging density of light source, and the local optics site away from light source is arranged
Row density is big.
5. a kind of glass light guide plate according to claim 1 or 4, it is characterised in that：Printed on the optics site layer (4)
There is ink.
6. a kind of glass light guide plate according to claim 1, it is characterised in that：The temperature of the vacuum evaporation is less than or waited
In 60 degrees Celsius.
7. a kind of glass light guide plate according to claim 1, it is characterised in that：Red, the green of the quantum dot (100)
Volume ratio with blueness is 1:2:3, quantum dot (100) is reconciled with epoxide resin reactive diluent；Vacuum 1*10-1-1*
10-6Pa, temperature range is 45-55 DEG C.
8. a kind of preparation method of glass light guide plate, it is characterised in that：Including
Quantum dot (100) is coated in the lower surface of upper glass (1)；
It is by glass cement (200) that the upper surface of the lower surface of upper glass (1) and lower glass (2) is bonding；
The diffusant for light to be spread to atomization is coated by roll coating model in the upper surface of upper glass (1)；
In the lower surface design optics site layer (4) and printing-ink of lower glass (2)；
Glass light guide plate is positioned in backlight module (300), and the reflector plate in the lower surface and backlight module of lower glass (2)
(5) fit.
9. a kind of preparation method of glass light guide plate according to claim 8, it is characterised in that：Quantum dot (100) passes through
The mode of vacuum evaporation is coated on the lower surface of glass (1), and the temperature of vacuum evaporation is less than or equal to 60 degrees Celsius.
10. a kind of preparation method of glass light guide plate according to claim 8, it is characterised in that：The optics site layer
(4) arrangement of the optics site in is curved, and small close to the local optics site arranging density of light source, the place away from light source
Optics site arranging density is big.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549436.XA CN107238886A (en) | 2017-07-07 | 2017-07-07 | A kind of glass light guide plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549436.XA CN107238886A (en) | 2017-07-07 | 2017-07-07 | A kind of glass light guide plate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107238886A true CN107238886A (en) | 2017-10-10 |
Family
ID=59991785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710549436.XA Pending CN107238886A (en) | 2017-07-07 | 2017-07-07 | A kind of glass light guide plate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107238886A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020884A (en) * | 2018-01-18 | 2018-05-11 | 合肥泰沃达智能装备有限公司 | A kind of novel glass light guide plate and preparation method thereof |
| CN108445580A (en) * | 2018-05-29 | 2018-08-24 | 青岛骐骥光电科技有限公司 | A kind of Quantum Dot Glass light guide plate assembly and its manufacturing method, backlight module, display |
| CN113156569A (en) * | 2021-04-23 | 2021-07-23 | 常州亚玛顿股份有限公司 | Low-color-cast backlight module |
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|---|---|---|---|---|
| US20160011360A1 (en) * | 2013-02-25 | 2016-01-14 | Nippon Electric Glass Co., Ltd. | Surface light-emitting device |
| CN205015587U (en) * | 2015-09-16 | 2016-02-03 | 深圳Tcl新技术有限公司 | Backlight module group and liquid crystal display |
| CN105700062A (en) * | 2016-04-12 | 2016-06-22 | 东莞轩朗实业有限公司 | Quantum dot glass light guide plate |
| CN106094328A (en) * | 2015-04-30 | 2016-11-09 | Lg电子株式会社 | Light change-over panel and containing its LED package, back light unit and display device |
| WO2017027676A1 (en) * | 2015-08-12 | 2017-02-16 | Corning Incorporated | Sealed devices and methods for making the same |
| CN207301388U (en) * | 2017-07-07 | 2018-05-01 | 青岛骐骥光电科技有限公司 | A kind of glass light guide plate |
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2017
- 2017-07-07 CN CN201710549436.XA patent/CN107238886A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160011360A1 (en) * | 2013-02-25 | 2016-01-14 | Nippon Electric Glass Co., Ltd. | Surface light-emitting device |
| CN106094328A (en) * | 2015-04-30 | 2016-11-09 | Lg电子株式会社 | Light change-over panel and containing its LED package, back light unit and display device |
| WO2017027676A1 (en) * | 2015-08-12 | 2017-02-16 | Corning Incorporated | Sealed devices and methods for making the same |
| CN205015587U (en) * | 2015-09-16 | 2016-02-03 | 深圳Tcl新技术有限公司 | Backlight module group and liquid crystal display |
| CN105700062A (en) * | 2016-04-12 | 2016-06-22 | 东莞轩朗实业有限公司 | Quantum dot glass light guide plate |
| CN207301388U (en) * | 2017-07-07 | 2018-05-01 | 青岛骐骥光电科技有限公司 | A kind of glass light guide plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020884A (en) * | 2018-01-18 | 2018-05-11 | 合肥泰沃达智能装备有限公司 | A kind of novel glass light guide plate and preparation method thereof |
| CN108445580A (en) * | 2018-05-29 | 2018-08-24 | 青岛骐骥光电科技有限公司 | A kind of Quantum Dot Glass light guide plate assembly and its manufacturing method, backlight module, display |
| CN113156569A (en) * | 2021-04-23 | 2021-07-23 | 常州亚玛顿股份有限公司 | Low-color-cast backlight module |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200226 Address after: No.36, Yuyuan Third Road, Jihongtan street, Chengyang District, Qingdao, Shandong Province Applicant after: Qingdao Guoqi Photoelectric Technology Co., Ltd Address before: 266000 jade Ridge Industrial Zone, Chengyang District, Shandong, Qingdao Applicant before: Qingdao Qiji Photoelectric Technology Co.,Ltd. |
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